challenge-bot.com Git - challenge-bot/blob - sonar-table-top-holder.scad

   1 // challenge-bot
   2 // GNU AGPLv3 (or later at your option)
   3 // project available at these locations:
   4 // https://gitorious.org/ozzloy/challenge-bot
   5 // https://github.com/waynegramlich/challenge-bot
   6
   7 $fn = 60;
   8
   9 // 3/16 inch in mm deck_depth = 4.7625;
  10 // 1/4 inch in mm - a little to be a squeeze fit
  11 deck_depth = 6.35 - 0.4;
  12 sonar_plate_width = 20;
  13 // sonar sensor measurements taken with calipers:
  14 //  10.82 in between, 42.33 outside, 15.82 diameter
  15 // measured diameter of 15.82 with calipers,
  16 //  but when printed ends up being too small
  17 sonar_sensor_radius = 15.82 / 2 + 0.3;
  18 sonar_sensor_height = 13.8;
  19 between_sensor_centers = 15.82 + 10.82;
  20 sonar_plate_length = 3 + between_sensor_centers + sonar_sensor_radius + 3;
  21 sonar_holder_length = sonar_plate_length + 10;
  22 sonar_holder_width = sonar_plate_width + 3;
  23 sonar_holder_depth = 4;
  24
  25 deck_holder_length = 30;
  26 deck_holder_width = sonar_holder_width;
  27
  28 module sensors(){
  29   translate([between_sensor_centers / 2, 0, 0]){
  30     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
  31   translate([-between_sensor_centers / 2, 0, 0]){
  32     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
  33
  34 module sensor_holder(){
  35   difference(){
  36     cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  37     translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
  38       sensors();}}
  39   translate([sonar_holder_length, 0, 0]){
  40     cube([sonar_holder_depth + 0.3, deck_depth - 0.3, deck_depth - 0.3]);
  41     translate([sonar_holder_depth + 0.3, 0, 0]){
  42       // subtract a little bit (0.3) to make it fit
  43       cube([deck_depth - 0.3, sonar_holder_width, deck_depth - 0.3]);}}}
  44
  45 module deck_holder(){
  46   cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);
  47   cube([sonar_holder_depth,
  48         sonar_holder_depth * 2 + deck_depth,
  49         sonar_holder_width]);
  50   translate([0, sonar_holder_depth + deck_depth, 0]){
  51     cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);}
  52   translate([sonar_holder_depth + deck_depth, 0, 0]){
  53     cube([sonar_holder_depth,
  54           sonar_holder_depth * 2 + deck_depth,
  55           sonar_holder_width]);}}
  56
  57 module sonar_table_top_holder(){
  58   difference(){
  59     union(){
  60       cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  61       translate([sonar_holder_length, 0, 0]){
  62         deck_holder();}}
  63     translate([between_sensor_centers / 2 + sonar_sensor_radius + 3,
  64                sonar_holder_width / 2,
  65                -1]){
  66       sensors();}
  67     // cut out a bit of the circle to make it 3d printable,
  68     //  no severe overhang
  69     translate([3 + sonar_sensor_radius,
  70                sonar_holder_width - 3.025,
  71                sonar_holder_depth / 2 - 0.025]){
  72       cube([10, 6.1, sonar_holder_depth + .1], center = true);
  73       translate([between_sensor_centers, 0, 0]){
  74         cube([10, 6.1, sonar_holder_depth + .1], center = true);}}}}
  75
  76 sensor_holder();